Pencil sharpener



FENG IL SHARPENER Filed June4 25, 1946 1:* E in *f E-,

#ifev Our l invention relateslamented Feb. 1o, l194s ppieatipiigune 25, 19st, serial no. 679,249

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Lpencil SharpenersH the.:primary--object fin view beingl to provide an eicient-.gsharpener.lof-view ":par-tsf-4 and inexpensive construction .adapted storm.,

Ybe `fastened-toeJ ixed base, andewhich willgnot Lilvreadily get points. i

presently appearing; .fa- Amelerred embodiment of `our inventionhasbeen illustrated Yin lthe accompanying drawing; set.` forthzin detail in the succeeding description, and defined in the claims appended hereto.

1nsaiddrawingrw 'Figure'iisf view'in'vertical section of our irnproved pencil Sharpener in the preferred embodiment thereof,

le: Figure 2-is` -a viewin verticalzsectioneof their.

sharpening unit detached and with the parts shown innormaleposition,i` Figure 3 is a view in transverse section taken Figure iris aview simi-lar tofFigureZ illustratringe-the manner in which the sharpening'unit is operated, and

Figure 5 is a view in perspective illustrating the plunger, abrading jaws and the jaw spacers disassembled. I

Referring to the drawing by numerals, according to our invention as illustrated, a pencil sharpener is provided including a base forming a shallow receptacle I of annular form having a top 2,

an internal bottom edge flange 3, a detachable, Y

disc-like bottom closure 4, and an externally threaded side wall 5. The top 2 is provided with an axial entrance aperture 6 into the receptacle surrounded by an upstanding, concentric, annular ilange 'I of relatively larger diameter. The closure 4 is provided with right angled keeper lugs 1 tting over the ange 3 to attach said closure and adapted, by turning of said closure to be registered with notches 8 in said flange 3 and Withdrawnthrough said notches, whereby said closure may be detached at will.

The top 2 of the receptacle I supports a sharp-r ening unit 9, the basic element of which is a hollow cylinder I having an internal lower end flange II, and the lower end of which is detachably secured in the flange I to rest on the top 2 with the cylinder axially aligned with the aperture 6 in communication therewith and said lower end tting in said flange 1. A set screw I threaded into the flange 'I secures the cylinder I0 ln the flange. The cylinder I0 is formed, between out of order, nor break the pencil4 i Javi/.sVV I .5.1 Offs ..calinder..Ill @Mameli 6 ry l' manner,`

sharpen tne.1ee1.af.;a Denil'in a mann .1, ently li-clear.

i of, said section, are itte'iuilnd.:Mw flange I4 and are space jaws alte. nrplildQ-,with

aced apart,

as wnrbeluride to dat gerinitfthieagpff a vpencil to.. entr ferraillethe..-=-..I Iiev Ma screws; -I5.-;extel1 di.lg,, lhlollgll ...fille .ll'f ...I :13nd through apertures 20 in the plunger I3 into the abrading jaws I9 fasten said jaws in said plunger and co-act with said slot I3 to impart rotary movement to the plunger I3 and said jaws I5 as will be understood. The spacer bars I6, it may be explained, are designed to be interposed between said jaws I 5 with a wedge t to secure the same in proper position in which a clear space is provided between said jaws inwardly of the spacer bars.

A helical expansion spring 2I in the cylinder I0 is interposed between the flange II of said cy1in der and the ilange Il of the plunger I3 and yieldingly resists movement of said plunger from normal position established by engagement of one of the machine screws I9 with the upper end of the slot I3.

An annular pencil guide 22 of cap-like form is threaded onto the upper end of the cylinder I0 and provided with a central aperture 23 in the vertical axis of the plunger I3 adapted to guide a, pencil inserted therethrough into the space between the faces I'I of the jaws I5.

A hollow dome-like shell 24 is threaded at its lower end onto the side wall 5 in covering relation to the sharpening unit 9 and is provided in the top thereof with a depending pencil guiding sleeve 25 in the vertical axis of said unit.

The manner in which the described invention is designed to be operated will be readily under y wardly through the aperture therein,

` thrust said jaws and plunger sharpened is inserted downsleeve 25 and aperture 23, as shown in Figures 1 and 4, until the writing end thereof engages the abrading faces I1 of the abrading jaws I and is then thrust downwardly against said faces to move said jaws I5 and the plunger I3 downwardly in opposition to the spring 2|. During such downward movement of the jaws I5 and plunger I3, the machine screws I9 and the spiral slot I3 cause, in the manner which `will be clear, the plunger I3 to be rotated, in one stood. pencil to be fafiaeei direction, and also the jaws I5 so that the abrading faces I'I of said jaws I5 are revolved about the writing end of the pencil, designated 2,6, to

ysharpen the same. Upon withdrawing the pencil 26, the spring 2I returns the plunger I3 and jaws I5 to normal position. The cuttings fall through' the space between the jaws I5, through the bottom end of the plunger I3 into the cylinder I0, zand from said cylinder, through the aperture 6, .into the receptacle I. When the receptacle I is full of cuttings it may be emptied by detaching :the closure 4 in the manner already described.

The foregoing, it is believed, will suice to im- 1 part a clear understanding of our invention, without further explanation.

Manifestly, the invention, as described, is susceptible of modification without departing from .the inventive concept, and right is herein re :served to such ymodifications as fall within the scope of the appended claims.

, What we claim is: j

1. In a pencil sharpen r, a base forming receptacle having a top provided with an entrance a sharpening unit comprising a hollow cylinder upstanding from said top coaxially with said aperture and provided with a helical slot therein, a hollow plunger slidably and p rotatably fitted in said cylinder, for movement downwardly therein from a normal position in the upper end of the cylinder, abrading jaws in said plunger grouped around the axis of the same and having inner abrading faces converging downwardly relatively `for sharpening the end of a pencil thrust downwardly against the same to downwardly, means 4 Y, securing said jaws in said plunger and extending through said slot for co-action therewith to cause the plunger to rotate upon downward movement thereof, and spring means in said cylinder yieldingly maintaining said plunger in said normal position, said plunger being open at the bottom thereof to permit cuttings to fall into the cylinder to drop through said aperture into the receptacle.

2. In a pencil Sharpener, a -base forming receptacle having a top provided-with an entrance aperture therein, a sharpening unit comprising a hollow cylinder upstanding from said top coaxially with said aperture and provided with a helical slot therein, a hollow plunger slidably and rntatably tted in said cylinder for movement downwardly therein from a normal position in the upper end of the cylinder, abrading jaws in said plunger grouped .around the axis of the same and having inner abrading faces converging downwardly relatively for sharpening the end of a pencil thrust downwardly against the same to thrust said jaws and plunger downwardly, means securing said jaws in said plunger and extending through said slot for co-action therewith to cause the plunger to rotate upon downward movement thereof, and spring means in said/ cylinder yieldingly maintaining said plunger in said normal position, said plunger being open at the bottom thereof to permit cuttings to fall into the cylinder to drop through said aperture into the receptacle, said jaws being spaced apart to provide for cuttings passing downwardly between the same.

CARL C. WATHERS. FRANCIS H. MCMICHAEL. REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 432,789 Burger July 22, 1890 819,123 Clough May 1, 1906 

